linux-kernel - [PATCH v2 0/9] x86: remove always-defined CONFIG_AS

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Message-Id: <20200324001358.4520-1-masahiroy@kernel.org>
Date:   Tue, 24 Mar 2020 09:13:49 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     x86@...nel.org, Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>, linux-crypto@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        "Jason A . Donenfeld" <Jason@...c4.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Ingo Molnar <mingo@...hat.com>,
        Jim Kukunas <james.t.kukunas@...ux.intel.com>,
        NeilBrown <neilb@...e.de>,
        Yuanhan Liu <yuanhan.liu@...ux.intel.com>,
        clang-built-linux@...glegroups.com
Subject: [PATCH v2 0/9] x86: remove always-defined CONFIG_AS_* options


arch/x86/Makefile tests instruction code by $(call as-instr, ...)

Some of them are very old.
For example, the check for CONFIG_AS_CFI dates back to 2006.

We raise GCC versions from time to time, and we clean old code away.
The same policy applied to binutils.

The current minimal supported version of binutils is 2.21

This is new enough to recognize the instruction in most of
as-instr calls.

If this series looks good, how to merge it?
Via x86 tree or maybe crypto ?


Changes in v2:
  - New patch
  - Remove CFI_SIGNAL_FRAME entirely (per Nick)
  - add ifdef CONFIG_X86 to fix build errors on non-x86 arches

Masahiro Yamada (9):
  lib/raid6/test: fix build on distros whose /bin/sh is not bash
  x86: remove unneeded defined(__ASSEMBLY__) check from asm/dwarf2.h
  x86: remove always-defined CONFIG_AS_CFI
  x86: remove unneeded (CONFIG_AS_)CFI_SIGNAL_FRAME
  x86: remove always-defined CONFIG_AS_CFI_SECTIONS
  x86: remove always-defined CONFIG_AS_SSSE3
  x86: remove always-defined CONFIG_AS_AVX
  x86: add comments about the binutils version to support code in
    as-instr
  x86: replace arch macros from compiler with CONFIG_X86_{32,64}

 arch/x86/Makefile                             | 21 +++------
 arch/x86/crypto/Makefile                      | 32 +++++---------
 arch/x86/crypto/aesni-intel_avx-x86_64.S      |  3 --
 arch/x86/crypto/aesni-intel_glue.c            | 14 +-----
 arch/x86/crypto/blake2s-core.S                |  2 -
 arch/x86/crypto/poly1305-x86_64-cryptogams.pl |  8 ----
 arch/x86/crypto/poly1305_glue.c               |  6 +--
 arch/x86/crypto/sha1_ssse3_asm.S              |  4 --
 arch/x86/crypto/sha1_ssse3_glue.c             |  9 +---
 arch/x86/crypto/sha256-avx-asm.S              |  3 --
 arch/x86/crypto/sha256_ssse3_glue.c           |  8 +---
 arch/x86/crypto/sha512-avx-asm.S              |  2 -
 arch/x86/crypto/sha512_ssse3_glue.c           |  7 +--
 arch/x86/include/asm/dwarf2.h                 | 44 -------------------
 arch/x86/include/asm/xor_avx.h                |  9 ----
 kernel/signal.c                               |  2 +-
 lib/raid6/algos.c                             |  6 +--
 lib/raid6/recov_ssse3.c                       |  6 ---
 lib/raid6/test/Makefile                       |  8 ++--
 19 files changed, 33 insertions(+), 161 deletions(-)

-- 
2.17.1